Side-mount auto flush for toilets offers intelligent technology and a smart design. Touch-free, automated flushing system helps keep washrooms looking presentable and smelling clean. It also promotes good hygiene by eliminating potential points of cross-contamination. Installing this chrome auto flush is easy. No water shutoff is required. Auto Flush system quickly retrofits existing washroom fixtures. The side-mount model replaces flush handles. Once installed, Smart Object Infrared Technology manages flushing automation for world-class reliability. Courtesy flush button ensures fixtures are flushed at least once per day to keep traps primed. Long battery life lasts approximately three years or up to 100,000 flushes. Battery reserve feature allows 9,000 flushes after low-battery indicator begins flashing. Auto flush uses four C batteries (included).